A distillation device for separating and purifying tetramethyltin

Abstract

The invention discloses a distillation device for separating and purifying tetramethyltin, which relates to the technical field of distillation. The device comprises an evaporating cylinder and a supporting cylinder, wherein a second bearing is fixedly connected to the inner side of the supporting cylinder, and the inner ring of the second bearing is fixedly connected to the evaporating cylinder. A scraping mechanism is provided on the inner side of the evaporating cylinder. The scraping mechanism forms a uniform thin liquid film on the bottle wall through the reverse differential rotation of the scraping plate and the evaporating cylinder, greatly increasing the evaporation area and improving the efficiency of separating and purifying tetramethyltin. When distilling medium-viscosity materials, a strong shear force is generated through the relative speed difference, breaking up impurity agglomerates (such as methyltin polymer agglomerates) in the liquid film, thereby facilitating the separation and purification of tetramethyltin. The centrifugal force fully spreads the liquid, greatly reducing wall residue (traditional distillation is prone to scaling at the bottom of the bottle). Simultaneously, the rotation heats the liquid film evenly, with a small temperature gradient (traditional distillation is prone to overheating at the bottom).

Description

Technical Field

[0001] The present invention relates to the technical field of distillation, in particular to a distillation device for separating and purifying tetramethyltin. Background Art

[0002] In many fields, such as chemical engineering, pharmaceuticals, and materials science, the purification of substances is crucial for obtaining high-purity products. Distillation, as a basic and widely used purification method, separates components in a mixture by utilizing the differences in boiling points. Distillation technology is also commonly used for the separation and purification of tetramethyltin. However, existing atmospheric distillation methods have the following significant problems:

[0003] Low separation efficiency: Relying on static evaporation, the liquid film is slowly renewed, and the mass transfer efficiency is low, especially for impurities with similar boiling points (such as trimethyltin chloride).

[0004] Poor material adaptability: It is difficult to effectively handle high viscosity (such as a methyl tin mixture containing 5% polymer with a viscosity greater than 100 cP) or complex systems containing trace solids, and local overheating and coking are prone to occur;

[0005] Insufficient automation: Existing distillation equipment lacks automatic cleaning function and requires manual intervention, which not only increases the burden on staff but also significantly reduces overall work efficiency. Therefore, in response to the above problems, a distillation equipment for separation and purification of tetramethyltin is proposed. Summary of the Invention

[0006] The object of the present invention is to provide a distillation device for separating and purifying tetramethyltin to solve the problems in the background technology.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A distillation device for separating and purifying tetramethyltin comprises an evaporating cylinder and a supporting cylinder, wherein a second bearing is fixedly connected to the inner side of the supporting cylinder, the inner ring of the second bearing is fixedly connected to the evaporating cylinder, a top cover is provided at the top of the evaporating cylinder, a second rotary sealing ring is fixedly connected to the outer side of the open end of the top cover, the top cover is rotatably connected to a condenser via the second rotary sealing ring, and a heating ring is fixedly connected to the top of the supporting cylinder, and the heating ring is located around the evaporating cylinder;

[0009] A scraping mechanism is provided on the inner side of the evaporating cylinder, and the scraping mechanism includes a support plate, one end of which is fixedly connected to the scraping plate, a liquid spraying mechanism is provided on the inner side of the support plate, a cover plate is provided on the support plate at the liquid spraying mechanism, and a moving mechanism is provided on the bottom end of the scraping mechanism, one end of the condensing tube is fixedly connected to a temperature sensor, and the end of the temperature sensor extends into the inner side of the evaporating cylinder;

[0010] The liquid spraying mechanism includes a three-way pipe connected to the connecting tube, and the three-way pipe is fixedly connected to the support plate. The outlet ends of the three-way pipe are both connected to a first outer tube body. One end of the first outer tube body is connected to the infusion tube, and the other end of the infusion tube is connected to the second outer tube body. The inner side of the second outer tube body is slidably connected to a liquid spraying pipe, and the surface of the liquid spraying pipe is provided with a liquid spraying port.

[0011] A first spring is fixedly connected to the inner side of the second outer tube, and the first spring is fixedly connected to the end surface of the liquid spraying pipe.

[0012] A top column is slidably connected to the inner side of the first outer tube body, the top end of the top column is fixedly connected to a limiting rod, and the other end of the limiting rod passes through the wall plate of the second outer tube body and engages with the spray pipe, the top end of the limiting rod is fixedly connected to a second spring, and the second spring is fixedly connected to the support plate.

[0013] Preferably, the bottom end of the evaporating cylinder is spirally connected to a plug, the outer side of the plug is fixedly connected to a limiting ring, and one end of the supporting cylinder is fixedly connected to a liquid guide tube.

[0014] Preferably, the film scraping mechanism further comprises a connecting cylinder fixedly connected to the support plate, one end of the connecting cylinder is in communication with the liquid spraying mechanism, the other end of the connecting cylinder is fixedly connected to a level adjustment component, and one end of the level adjustment component is provided with a fixed disk;

[0015] The outer side of the fixed plate is fixedly connected to a first bearing, the outer ring of the first bearing is fixedly connected to a horizontal plate fixedly connected to the support tube, the top of the fixed plate is fixedly connected to a first gear ring, the inner side of the support tube is fixedly connected to a first motor, the end of the main shaft of the first motor is fixedly connected to a telescopic assembly, the other end of the telescopic assembly is fixedly connected to a gear, and the bottom end of the gear is meshed with the first gear ring, and the top end of the gear is meshed with a second gear ring fixedly connected to the evaporating tube.

[0016] Preferably, the outer side of the connecting cylinder is slidably connected to a support frame, the outer side of the bottom end of the support frame is fixedly connected to a connecting disk, and a first rotating sealing ring is provided between the connecting disk and the evaporating cylinder.

[0017] Preferably, the horizontal adjustment assembly includes a first wedge block fixedly connected to the connecting tube, one end of the first wedge block is slidably connected to the second wedge block, the bottom end of the second wedge block is fixedly connected to a connecting tube slidably connected to both the fixed plate and the support frame, the bottom end of the connecting tube is connected to a rotary joint, one end of the connecting tube is connected to an infusion tube, and the infusion tube is connected to the connecting tube.

[0018] Preferably, the telescopic assembly includes an inner rod fixedly connected to the first motor shaft, the outer side of the inner rod is slidably connected to an outer shell fixedly connected to the gear, one end of the outer shell is spirally connected to the inner side of a locking screw, and one end of the locking screw is in contact with the inner rod.

[0019] Preferably, the moving mechanism includes a second motor fixedly connected to the support tube, the end of the main shaft of the second motor is fixedly connected to a screw, the outer side of the screw is spirally connected to a slider, the top end of the slider is rotatably connected to a push plate, the other end of the push plate is rotatably connected to a top plate fixedly connected to a rotary joint, and the bottom end of the slider is slidably connected to a guide rail fixedly connected to the support tube.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] A distillation apparatus for separating and purifying tetramethyltin is provided with a scraping mechanism. The scraping plate and evaporating cylinder rotate at opposite speeds to form a uniform thin liquid film on the bottle wall, significantly increasing the evaporation area and improving the efficiency of tetramethyltin separation and purification. When distilling medium-viscosity materials, the relative speed difference generates a strong shear force, breaking up impurity aggregates (such as methyltin polymer agglomerates) in the liquid film, facilitating the separation and purification of tetramethyltin. Furthermore, centrifugal force fully spreads the liquid, significantly reducing wall residue (conventional distillation is prone to scale formation at the bottom of the bottle). Simultaneously, rotation heats the liquid film evenly, minimizing temperature gradients (conventional distillation is prone to overheating at the bottom).

[0022] 2. A distillation device for separating and purifying tetramethyltin is provided with a liquid spraying mechanism. When the evaporating cylinder needs to be cleaned, the liquid spraying mechanism automatically sprays the cleaning liquid onto the inner wall of the evaporating cylinder. At the same time, the rotation of the scraper plate is used to realize automatic cleaning of the inner wall of the evaporating cylinder. This design avoids the tedious operation of manual cleaning, significantly improves the cleaning efficiency, and greatly reduces the operating burden of the staff, making the equipment more convenient and efficient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Figure 1 The figure is a schematic diagram of the overall structure of a distillation device for separating and purifying tetramethyltin according to the present invention.

[0025] Figure 2 The figure is a schematic diagram of the cross-section structure of a distillation device for separating and purifying tetramethyltin according to the present invention.

[0026] Figure 3 The figure is a schematic diagram of the installation structure of the second gear ring of a distillation device for separating and purifying tetramethyltin according to the present invention.

[0027] Figure 4 The present invention is a schematic diagram of the installation structure of the liquid spraying mechanism of the distillation equipment for separating and purifying tetramethyltin.

[0028] Figure 5 The present invention is a schematic diagram of the installation structure of a three-way pipe of a distillation device for separating and purifying tetramethyltin.

[0029] Figure 6 The present invention is a schematic diagram of the installation structure of the liquid spray pipe of the distillation equipment for separating and purifying tetramethyltin.

[0030] Figure 7 The figure is a schematic diagram of the installation structure of the first wedge-shaped block of a distillation device for separating and purifying tetramethyltin according to the present invention.

[0031] Figure 8 The present invention is a schematic structural diagram of an inner rod of a distillation device for separating and purifying tetramethyltin.

[0032] Figure 9 The present invention is a schematic diagram of the installation structure of the infusion pipe of the distillation equipment for separating and purifying tetramethyltin.

[0033] Figure 10 The present invention is a schematic structural diagram of a moving mechanism of a distillation device for separating and purifying tetramethyltin.

[0034] Figure 11 The present invention is a schematic diagram of the installation structure of a limit ring of a distillation device for separating and purifying tetramethyltin.

[0035] In the figure: 1, scraping mechanism; 101, support plate; 102, scraping plate; 103, connecting tube; 104, first wedge block; 105, second wedge block; 106, connecting tube; 107, fixing plate; 108, first gear ring; 109, gear; 110, second gear ring; 111, housing; 112, locking screw; 113, inner rod; 114, first motor; 115, rotary joint; 116, cover plate; 117, first rotary sealing ring; 118, connecting plate; 119, first bearing; 120, cross plate; 121, support frame;

[0036] 2. Liquid spray mechanism; 201. Infusion tube; 202. Tee; 203. First outer tube; 204. Top column; 205. First spring; 206. Limit rod; 207. Second spring; 208. Infusion tube; 209. Second outer tube; 210. Liquid spray tube; 211. Liquid spray port;

[0037] 3. Moving mechanism; 301. Second motor; 302. Screw; 303. Slider; 304. Guide rail; 305. Push plate; 306. Top plate;

[0038] 4. Evaporator tube; 5. Heating ring; 6. Support tube; 7. Second bearing; 8. Top cover; 9. Second rotary sealing ring; 10. Condenser tube; 11. Limiting ring; 12. Liquid guide tube; 13. Plug; 14. Temperature sensor. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with specific embodiments. The accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual drawings. They should not be understood as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. At the same time, all precision instruments such as lead screws, screws, gears, racks, etc. are equipped with protective structures such as protective covers on the outside. As common knowledge, the description will not elaborate on them in detail. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. Based on the specific embodiments of the present invention, all other specific embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, in the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The present invention will be further elaborated below in conjunction with specific embodiments.

[0041] Example

[0042] This device is equipped with an intelligent control panel, which establishes a real-time communication connection with the central industrial control computer via an industrial-grade signal transmission line. The control system adopts a modular program design and has a built-in material parameter database. It pre-stores the optimal process parameter combinations corresponding to tetramethyltin mixtures with different viscosities, including the distance between the scraping plate 102 and the inner wall of the evaporating cylinder 4, the corresponding liquid film thickness, and the addition amount. After the staff of the above system confirms the material viscosity, it automatically matches the corresponding process parameters and coordinates the timing actions of the scraping mechanism 1, the spraying mechanism 2, and the moving mechanism 3.

[0043] like Figures 1-11 As shown, a distillation device for separating and purifying tetramethyltin includes an evaporating cylinder 4 and a supporting cylinder 6. A door panel is provided on one side of the supporting cylinder 6. After opening the door panel, it is convenient to disassemble or adjust the parts inside the supporting cylinder 6. A second bearing 7 is fixedly connected to the inner side of the supporting cylinder 6. The inner ring of the second bearing 7 is fixedly connected to the evaporating cylinder 4. The second bearing 7 facilitates the rotation of the evaporating cylinder 4. A top cover 8 is provided on the top of the evaporating cylinder 4; the top cover 8 can be connected to the evaporating cylinder 4 by a flange, a screw or a snap connection, so that the top cover 8 can be removed to add a tetramethyltin mixture to the inner side of the evaporating cylinder 4. A second rotating sealing ring 9 is fixedly connected to the outer side of the open end of the top cover 8. The top cover 8 is rotatably connected to the condensing Tube 10; by providing a second rotating sealing ring 9, the top cover 8 and the condenser tube 10 can maintain good sealing performance while rotating relative to each other, effectively preventing leakage of tetramethyltin vapor, the top of the support tube 6 is fixedly connected to the heating ring 5, one end of the condenser tube 10 is fixedly connected to the temperature sensor 14, and the end of the temperature sensor 14 extends into the inner side of the evaporation tube 4; the heating ring 5 is arranged around the outside of the evaporation tube 4, and can evenly heat the evaporation tube 4, so that the tetramethyltin mixture in the evaporation tube 4 is quickly heated, promoting efficient evaporation of the tetramethyltin component; the temperature sensor 14 monitors the internal temperature of the evaporation tube 4 in real time, and accurately adjusts the heating power through the temperature feedback control system, effectively preventing the risk of thermal decomposition caused by excessive temperature;

[0044] A scraping mechanism 1 is provided on the inner side of the evaporating cylinder 4. The scraping mechanism 1 includes a support plate 101. One end of the support plate 101 is fixedly connected to a scraping plate 102. The distance between the scraping plate 102 and the inner wall of the evaporating cylinder 4 and the corresponding liquid film thickness are dynamically adjusted according to the viscosity of the material. For example, a 50L evaporating cylinder 4 is used as an example for explanation:

[0045] Low viscosity system (<5cP, such as tetramethyltin-benzene solution): working distance: 0.3-0.4mm, corresponding liquid film thickness: 0.2-0.3mm, material addition amount: 10-15L.

[0046] Medium viscosity system (5-50cP, containing polymer impurities): working distance: 0.4-0.6mm, corresponding liquid film thickness: 0.3-0.4mm, material addition amount: 15-25L.

[0047] High viscosity system (>50cP, containing solid particles): working distance: 0.6-0.8mm, corresponding liquid film thickness: 0.4-0.5mm, material addition amount: 25-30L.

[0048] Basic addition amount calculation formula:

[0049] η

[0050] V: feed volume (L)

[0051] r: inner radius of the evaporator (the radius of a 50L standard evaporator is about 20cm)

[0052] h: target liquid film thickness (0.1-0.5mm, i.e. 0.01-0.05cm)

[0053] η: Filling factor (0.4-0.5, considering uneven liquid distribution)

[0054] Example calculation (liquid film 0.3mm, η=0.4)

[0055] 3.14*20 2 *0.03*0.4≈15L

[0056] The scraping plate 102 is made of corrosion-resistant fluororubber (Shore hardness 60±5) and is precisely positioned via a horizontal adjustment assembly and a movable mechanism 3 (with an error of ±0.05mm). The reverse differential rotation of the scraping plate 102 with the evaporating cylinder 4 generates a shear stress of 200-500Pa, ensuring the formation of a uniform liquid film with a thickness deviation of less than 5%. This structural design significantly increases the evaporation contact area and effectively improves the separation and purification efficiency of tetramethyltin. A liquid spraying mechanism 2 is provided on the inner side of the support plate 101. A cover plate 116 is provided at the liquid spraying mechanism 2. The cover plate 116 is used to seal the connection gap between the liquid spraying mechanism 2 and the support plate 101 to prevent material from penetrating the inner side of the support plate 101. The movable mechanism 3 is provided at the bottom end of the scraping mechanism 1.

[0057] As a further improvement of the present invention, Figure 5 、 Figure 6 、 Figure 7 and Figure 9 As shown, the liquid spraying mechanism 2 includes a three-way pipe 202 connected to the connecting tube 103, and the three-way pipe 202 is fixedly connected to the support plate 101. The outlet end of the three-way pipe 202 is connected to the first outer tube body 203, one end of the first outer tube body 203 is connected to the infusion tube 208, and the other end of the infusion tube 208 is connected to the second outer tube body 209. The inner side of the second outer tube body 209 is slidably connected to the liquid spraying pipe 210, and the surface of the liquid spraying pipe 210 is provided with a liquid spraying port 2 11; The liquid spray pipe 210 adopts a hollow structure design, with its liquid inlet opening facing the infusion cylinder 208, and the spray direction of the liquid spray port 211 facing the inner wall of the evaporation cylinder 4, ensuring that the cleaning liquid can be accurately sprayed onto the inner wall surface of the evaporation cylinder 4; the cleaning liquid is transported along the following path: it flows through the interior of the connecting cylinder 103, the three-way pipe 202, the first outer tube 203, the infusion cylinder 208, and then enters the liquid spray pipe 210, and is finally sprayed toward the inner wall of the evaporation cylinder 4 through the liquid spray port 211;

[0058] A first spring 205 is fixedly connected to the inner side of the second outer tube body 209, and the first spring 205 is fixedly connected to the end face of the spray pipe 210. The first spring 205 applies elastic tension to the spray pipe 210. When the scraping plate 102 performs the scraping operation, the spray pipe 210 is completely retracted into the second outer tube body 209 under the tension of the first spring 205. This design ensures that the spray port 211 will not be exposed, effectively preventing the tetramethyltin mixture from reversely penetrating into the spray pipe 210 through the spray port 211.

[0059] A top column 204 is slidably connected to the inner side of the first outer tube 203. The top end of the top column 204 is fixedly connected to a limit rod 206. The other end of the limit rod 206 passes through the wall plate of the second outer tube 209 and engages with the spray tube 210. The top end of the limit rod 206 is fixedly connected to a second spring 207, and the second spring 207 is fixedly connected to the support plate 101. The inner walls of the top ends of the second outer tube 209 and the spray tube 210 are both provided with a slot structure that matches the end of the limit rod 206. The slot on the surface of the spray tube 210 adopts a non-through design, which ensures the limiting function while maintaining the integrity of the wall of the spray tube 210 and the infusion sealing performance.

[0060] The limiting rod 206 adopts an L-shaped structural design, with one end being a vertical plane and the other end being an arc-shaped transition surface. The second spring 207 applies a downward elastic force to the limiting rod 206, so that the limiting rod 206 can achieve engagement and position limiting with the spray pipe 210 through the vertical plane, effectively preventing the spray pipe 210 from accidentally falling out of the second outer tube body 209 due to centrifugal force during operation of the device. When the spray pipe 210 needs to be retracted, the pulling force of the first spring 205 and the guidance of the arc-shaped surface of the limiting rod 206 enable the spray pipe 210 to overcome the resistance of the second spring 207 and achieve reliable engagement with the limiting rod 206.

[0061] When the limiting rod 206 and the liquid spraying tube 210 are in the engaged state, the connecting tube 103 delivers the cleaning liquid to the first outer tube body 203 through the three-way tube 202; as the hydraulic pressure in the first outer tube body 203 gradually increases, the liquid pressure overcomes the elastic resistance of the second spring 207, pushes the top column 204 to drive the limiting rod 206 to move upward, and releases the limit on the liquid spraying tube 210; when the top column 204 moves up to above the inlet end of the infusion cylinder 208, the cleaning liquid enters the second outer tube body 209 through the infusion cylinder 208; at this time, the liquid spraying port 211 is initially in the closed state of the second outer tube body 209. As the hydraulic pressure continues to rise, the liquid pressure overcomes the elastic resistance of the first spring 205, driving the liquid spraying tube 210 to extend outward from the second outer tube body 209 until the liquid spraying port 211 is fully extended and enters the normal working liquid spraying state.

[0062] As a further improvement of the present invention, Figure 2 and Figure 11As shown, the bottom end of the evaporating tube 4 is spirally connected with a plug 13, and the outer side of the plug 13 is fixedly connected to the limit ring 11. When the limit ring 11 is in contact with the bottom of the evaporating tube 4, the top surface of the plug 13 is in contact with the inner wall of the evaporating tube 4, ensuring that the plug 13 will not affect the rotation of the support plate 101 and the scraper plate 102; one end of the support tube 6 is fixedly connected with a liquid guide tube 12, and the plug 13 can seal the drain port at the bottom of the evaporating tube 4 to ensure that the evaporating tube 4 can normally distill and purify the tetramethyltin mixture; and when the inner wall of the evaporating tube 4 needs to be cleaned, the plug 13 can be removed, and when the evaporating tube 4 is cleaned, the drain port at the bottom of the evaporating tube 4 needs to be aligned with the liquid guide tube 12 to allow the waste liquid to flow directly to the inside of the liquid guide tube 12.

[0063] As a further improvement of the present invention, Figure 2 、 Figure 3 、 Figure 8 As shown, the scraping mechanism 1 also includes a connecting tube 103 fixedly connected to the support plate 101, one end of the connecting tube 103 is communicated with the liquid spraying mechanism 2, and the other end of the connecting tube 103 is fixedly connected to a horizontal adjustment component, and one end of the horizontal adjustment component is provided with a fixed disk 107; the connecting tube 103 adopts a hollow structure design and has a dual function: on the one hand, it provides rigid support for the support plate 101 and can assist in adjusting the distance between the scraping plate 102 and the inner wall of the evaporating tube 4; on the other hand, it serves as a conveying channel for the cleaning liquid during the cleaning operation, and conveys the cleaning liquid to the inner wall of the evaporating tube 4 for cleaning.

[0064] The outer side of the fixed disk 107 is fixedly connected to a first bearing 119, the outer ring of the first bearing 119 is fixedly connected to a horizontal plate 120 fixedly connected to the support cylinder 6, the top of the fixed disk 107 is fixedly connected to a first gear ring 108, the inner side of the support cylinder 6 is fixedly connected to a first motor 114, the main shaft end of the first motor 114 is fixedly connected to a telescopic assembly, the other end of the telescopic assembly is fixedly connected to a gear 109, and the bottom end of the gear 109 is meshed with the first gear ring 108, and the top of the gear 109 is meshed with a second gear ring 110 fixedly connected to the evaporation cylinder 4; the outer side of the connecting cylinder 103 is slidably connected to a support frame 121, and the outer side of the bottom end of the support frame 121 is fixedly connected to a connecting disk 118, and a first rotating sealing ring 117 is provided between the connecting disk 118 and the evaporation cylinder 4; the first rotating sealing ring 117 enables the connecting disk 118 and the evaporation cylinder 4 to maintain good sealing performance while rotating relative to each other, thereby effectively preventing leakage of the tetramethyltin mixture;

[0065] The number of teeth of the first gear ring 108 is smaller than the number of teeth of the second gear ring 110. For example, the number of teeth of the first gear ring 108 is set to 40, and the number of teeth of the second gear ring 110 is set to 60. The differential rotation of the scraping plate 102 and the evaporating tube 4 is achieved by the difference in the number of teeth. When it is necessary to make the two rotate in the opposite direction at a differential speed, the first motor 114 drives the gear 109 to rotate clockwise through the telescopic component, and the gear 109 simultaneously engages to drive the first gear ring 108 and the second gear ring 110 to rotate. Among them, the second gear ring 110 drives the evaporating tube 4 to rotate counterclockwise, and the first gear ring 108 is driven by the fixed plate 107, the horizontal adjustment component, the support frame 121, and the connecting tube 103, and finally drives the scraping plate 102 to rotate clockwise, thereby realizing the reverse differential motion between the evaporating tube 4 and the scraping plate 102.

[0066] As a further improvement of the present invention, Figure 3 and Figure 7 As shown, the horizontal adjustment assembly includes a first wedge block 104 fixedly connected to the connecting cylinder 103, one end of the first wedge block 104 is slidably connected to the second wedge block 105, the bottom end of the second wedge block 105 is fixedly connected to a connecting pipe 106 slidably connected to both the fixed plate 107 and the support frame 121, the connecting pipe 106 and the connecting plate 118 can slide with each other, the bottom end of the connecting pipe 106 is connected to a rotary joint 115 (the working principle of the rotary joint 115 is the prior art and will not be described in detail here), one end of the connecting pipe 106 is connected to There is an infusion tube 201, which is connected to the connecting tube 103. The connecting tube 106 adopts a U-shaped stainless steel tube structure, which has the dual functions of rigid connection and cleaning liquid delivery. The infusion tube 201 is made of a metal hose to ensure that the connecting tube 106 can move unrestricted in the vertical direction. The inlet end of the rotary joint 115 is connected to the external cleaning liquid storage tank through a water pump. When in operation, the water pump sequentially delivers the cleaning liquid in the storage tank through the rotary joint 115, the connecting tube 106, the infusion tube 201 and the connecting tube 103 to the interior of the spray mechanism 2.

[0067] When the moving mechanism 3 drives the connecting tube 106 to move along the fixed plate 107 and the connecting plate 118 in the vertical direction, the connecting tube 106 drives the first wedge block 104 and the second wedge block 105 to slide relative to each other; through the interaction between the first wedge block 104 and the second wedge block 105, the connecting tube 103 drives the scraping plate 102 to move relative to the inner wall of the evaporation tube 4 via the support plate 101: when the connecting tube 106 moves upward, the scraping plate 102 gradually approaches and finally fits the inner wall of the evaporation tube 4. At this time, the cleaning effect of the inner wall of the evaporation tube 4 can be achieved, avoiding the tedious operation of manual cleaning, significantly improving the cleaning efficiency, and greatly reducing the operating burden of the staff, making the equipment more convenient and efficient to use; when the connecting tube 106 moves downward, the scraping plate 102 is away from the inner wall of the evaporation tube 4, and the scraping function can be normally performed;

[0068] When the first gear ring 108 rotates with the fixed disk 107 , the fixed disk 107 also rotates with the support frame 121 , the first wedge block 104 , and the second wedge block 105 through the connecting tube 106 .

[0069] As a further improvement of the present invention, Figure 3 and Figure 8 As shown, the telescopic assembly includes an inner rod 113 fixedly connected to the main shaft of the first motor 114, and the outer side of the inner rod 113 is slidably connected to a shell 111 fixedly connected to the gear 109, and a locking screw 112 is spirally connected to the inner side of one end of the shell 111, and one end of the locking screw 112 abuts against the inner rod 113. The position between the inner rod 113 and the shell 111 can be fixed by the friction between the locking screw 112 and the inner rod 113; by manually adjusting the relative position of the shell 111 and the inner rod 113, the meshing state of the gear 109 can be accurately controlled: the gear 109 can be selected to mesh with the first gear ring 108 alone, or it can be simultaneously meshed with the first gear ring 108 and the first gear ring 108. Double engagement of the two tooth rings 110; when cleaning the inner wall of the evaporator tube 4, the gear 109 is adjusted to engage only with the first tooth ring 108. At this time, the scraper plate 102 rotates inside the evaporator tube 4 to perform cleaning, while the evaporator tube 4 remains stationary, ensuring that its bottom drainage port and the liquid guide tube 12 are always precisely aligned to avoid drainage misalignment. At the same time, a threaded hole can also be opened on the surface of the support tube 6, and then the threaded top rod is abutted against the evaporator tube 4. The evaporator tube 4 is limited by friction, which further improves the stability of the evaporator tube 4 and keeps the evaporator tube 4 stationary when cleaning the inner wall. When the evaporator tube 4 needs to rotate, the top rod can be separated from the evaporator tube 4.

[0070] As a further improvement of the present invention, Figure 10 The cam 303 is connected to the second end of the cam 304 by the second motor 301, and the cam 303 is connected to the second end of the cam 304 by the second motor 301.

[0071] The above is a preferred embodiment of the present invention. The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Without departing from the scope of protection of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A distillation apparatus for separating and purifying tetramethyltin, comprising an evaporating cylinder (4) and a supporting cylinder (6), characterized in that: The inner side of the support tube (6) is fixedly connected to a second bearing (7), the inner ring of the second bearing (7) is fixedly connected to the evaporation tube (4), the top end of the evaporation tube (4) is provided with a top cover (8), the outer side of the open end of the top cover (8) is fixedly connected to a second rotary sealing ring (9), the top cover (8) is rotatably connected to a condenser tube (10) through the second rotary sealing ring (9), the top end of the support tube (6) is fixedly connected to a heating ring (5), and the heating ring (5) is located around the evaporation tube (4); A scraping mechanism (1) is provided on the inner side of the evaporating tube (4), the scraping mechanism (1) comprising a support plate (101), one end of the support plate (101) being fixedly connected to a scraping plate (102), a liquid spraying mechanism (2) being provided on the inner side of the support plate (101), a cover plate (116) being provided on the support plate (101) at the liquid spraying mechanism (2), a moving mechanism (3) being provided at the bottom end of the scraping mechanism (1), one end of the condensing tube (10) being fixedly connected to a temperature sensor (14), and an end portion of the temperature sensor (14) extending into the inner side of the evaporating tube (4); The liquid spraying mechanism (2) comprises a three-way pipe (202) connected to the connecting tube (103), and the three-way pipe (202) is fixedly connected to the support plate (101), the outlet end of the three-way pipe (202) is connected to the first outer tube body (203), one end of the first outer tube body (203) is connected to the infusion tube (208), and the other end of the infusion tube (208) is connected to the second outer tube body (209), the inner side of the second outer tube body (209) is slidably connected to the liquid spraying pipe (210), the surface of the liquid spraying pipe (210) is provided with a liquid spraying port (211), the inner side of the second outer tube body (209) is fixedly connected to the first spring (205), and the first spring (205) is fixedly connected to the end face of the liquid spraying pipe (210); The inner side of the first outer tube body (203) is slidably connected to a top column (204), the top end of the top column (204) is fixedly connected to a limiting rod (206), and the other end of the limiting rod (206) passes through the wall plate of the second outer tube body (209) and engages with the liquid spraying pipe (210), the top end of the limiting rod (206) is fixedly connected to a second spring (207), and the second spring (207) is fixedly connected to the support plate (101), and the limiting rod (206) adopts an L-shaped structural design, with one end being a vertical plane and the other end being an arc-shaped transition surface.

2. A distillation apparatus for separating and purifying tetramethyltin according to claim 1, characterized in that: The bottom end of the evaporating cylinder (4) is spirally connected to a plug (13), the outer side of the plug (13) is fixedly connected to a limiting ring (11), and one end of the supporting cylinder (6) is fixedly connected to a liquid guide tube (12).

3. A distillation apparatus for separating and purifying tetramethyltin according to claim 1, characterized in that: The film scraping mechanism (1) further comprises a connecting tube (103) fixedly connected to the support plate (101), one end of the connecting tube (103) being in communication with the liquid spraying mechanism (2), the other end of the connecting tube (103) being fixedly connected to a level adjustment component, one end of the level adjustment component being provided with a fixed disk (107); The outer side of the fixed disk (107) is fixedly connected to a first bearing (119), the outer ring of the first bearing (119) is fixedly connected to a transverse plate (120) fixedly connected to the support tube (6), the top of the fixed disk (107) is fixedly connected to a first gear ring (108), the inner side of the support tube (6) is fixedly connected to a first motor (114), the main shaft end of the first motor (114) is fixedly connected to a telescopic assembly, the other end of the telescopic assembly is fixedly connected to a gear (109), and the bottom end of the gear (109) is meshed with the first gear ring (108), and the top end of the gear (109) is meshed with a second gear ring (110) fixedly connected to the evaporating tube (4).

4. A distillation apparatus for separating and purifying tetramethyltin according to claim 3, characterized in that: The outer side of the connecting cylinder (103) is slidably connected to a support frame (121), the outer side of the bottom end of the support frame (121) is fixedly connected to a connecting disk (118), and a first rotating sealing ring (117) is provided between the connecting disk (118) and the evaporating cylinder (4).

5. A distillation apparatus for separating and purifying tetramethyltin according to claim 3, characterized in that: The horizontal adjustment assembly comprises a first wedge block (104) fixedly connected to the connecting cylinder (103); one end of the first wedge block (104) is slidably connected to a second wedge block (105); the bottom end of the second wedge block (105) is fixedly connected to a connecting tube (106) slidably connected to both the fixed plate (107) and the support frame (121); the bottom end of the connecting tube (106) is connected to a rotary joint (115); one end of the connecting tube (106) is connected to an infusion tube (201), and the infusion tube (201) is connected to the connecting cylinder (103).

6. A distillation apparatus for separating and purifying tetramethyltin according to claim 3, characterized in that: The telescopic assembly comprises an inner rod (113) fixedly connected to the main shaft of the first motor (114); the outer side of the inner rod (113) is slidably connected to a housing (111) fixedly connected to the gear (109); a locking screw (112) is spirally connected to the inner side of one end of the housing (111), and one end of the locking screw (112) abuts against the inner rod (113).

7. A distillation apparatus for separating and purifying tetramethyltin according to claim 1, characterized in that: The moving mechanism (3) comprises a second motor (301) fixedly connected to the support cylinder (6); a screw (302) is fixedly connected to the end of the main shaft of the second motor (301); a slider (303) is spirally connected to the outer side of the screw (302); the top end of the slider (303) is rotatably connected to a push plate (305); the other end of the push plate (305) is rotatably connected to a top plate (306) fixedly connected to the rotary joint (115); and the bottom end of the slider (303) is slidably connected to a guide rail (304) fixedly connected to the support cylinder (6).

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